Hallo,
ich schließe mich mal an 
Auf meinen zwei Nextcloud Instanzen unter Apache 2 habe ich die gleiche Fehlermeldung.
<?php
$CONFIG = array (
'passwordsalt' => 'XXX',
'secret' => 'XXX',
'trusted_domains' =>
array (
0 => 'localhost',
1 => 'XXX.XXX.XXX.66',
2 => 'serv6.XXX.de',
3 => '192.168.12.6',
),
'datadirectory' => '/mnt/ncdata',
'dbtype' => 'pgsql',
'version' => '29.0.0.19',
'overwrite.cli.url' => 'https://XXX.de/',
'dbname' => 'nextcloud_db',
'dbhost' => 'localhost',
'dbport' => '',
'dbtableprefix' => 'oc_',
'dbuser' => 'nextcloud_db_user',
'dbpassword' => 'XXX',
'installed' => true,
'instanceid' => 'XXX',
'upgrade.disable-web' => 'true',
'log_type' => 'file',
'default_language' => 'de',
'default_locale' => 'de',
'logfile' => '/var/log/nextcloud/nextcloud.log',
'loglevel' => '2',
'allow_local_remote_servers' => true,
'log.condition' =>
array (
'apps' =>
array (
0 => 'admin_audit',
),
),
'mail_smtpmode' => 'smtp',
'remember_login_cookie_lifetime' => '1800',
'log_rotate_size' => '0',
'trashbin_retention_obligation' => 'auto, 180',
'versions_retention_obligation' => 'auto, 365',
'memcache.local' => '\\OC\\Memcache\\Redis',
'simpleSignUpLink.shown' => false,
'filelocking.enabled' => true,
'memcache.distributed' => '\\OC\\Memcache\\Redis',
'memcache.locking' => '\\OC\\Memcache\\Redis',
'redis' =>
array (
'host' => '/var/run/redis/redis-server.sock',
'port' => 0,
'timeout' => 0.5,
'dbindex' => 0,
'password' => 'XXX',
),
'default_phone_region' => 'de',
'logtimezone' => 'Europe/Berlin',
'maintenance_window_start' => 1,
'htaccess.RewriteBase' => '/',
'maintenance' => false,
'mail_from_address' => 'nextcloud',
'mail_sendmailmode' => 'smtp',
'mail_domain' => 'XXX.de',
'mail_smtpauthtype' => 'LOGIN',
'mail_smtpauth' => 1,
'mail_smtphost' => 'serv5.XXX.de',
'mail_smtpname' => 'nextcloud@XXX.de',
'mail_smtppassword' => 'XXX',
'twofactor_enforced' => 'false',
'twofactor_enforced_groups' =>
array (
),
'twofactor_enforced_excluded_groups' =>
array (
),
'mail_smtpport' => '465',
'mail_smtpsecure' => 'ssl',
'enable_previews' => true,
'enabledPreviewProviders' =>
array (
11 => 'OC\\Preview\\PNG',
12 => 'OC\\Preview\\JPEG',
13 => 'OC\\Preview\\GIF',
14 => 'OC\\Preview\\BMP',
15 => 'OC\\Preview\\MarkDown',
16 => 'OC\\Preview\\MP3',
17 => 'OC\\Preview\\TXT',
18 => 'OC\\Preview\\Movie',
0 => 'OC\\Preview\\Imaginary',
1 => 'OC\\Preview\\Image',
2 => 'OC\\Preview\\MarkDown',
3 => 'OC\\Preview\\MP3',
4 => 'OC\\Preview\\TXT',
5 => 'OC\\Preview\\OpenDocument',
6 => 'OC\\Preview\\Movie',
7 => 'OC\\Preview\\Krita',
),
'preview_max_x' => '2048',
'preview_max_y' => '2048',
'jpeg_quality' => '60',
'trusted_proxies' =>
array (
0 => '127.0.0.1',
1 => '::1',
),
'preview_concurrency_new' => '32',
'preview_concurrency_all' => '64',
'preview_imaginary_url' => 'http://127.0.0.1:9000',
'preview_max_memory' => '256',
'app_install_overwrite' =>
array (
0 => 'twofactor_email',
1 => 'groupfolders',
2 => 'maps',
),
);
Die Tips aus den Beiträgen vorher habe ich befolgt, leider ohne Erfolg. Es scheint wohl Bug zu sein.
Ich verwende bei beiden Instanzen die offizielle Nextcloud VM.